【作者】
阿布里克木·麦迪娜;
白景芝;
白羽;
班勇;
蔡啸;
陈宏芳;
陈和生;
陈江川;
陈进;
陈元柏;
陈初萍;
戴又善;
邓子艳;
杜书先;
方建;
傅成栋;
高原宁;
顾运厅;
郭子敬;
F.A.Huarris;
何康林;
何瑁;
衡月昆;
胡海明;
T.Hussain;
胡涛;
黄光顺;
黄性涛;
黄燕萍;
季晓斌;
江晓山;
焦健斌;
金大鹏;
金山;
李刚;
李海波;
李金;
李蕾;
李仁英;
李卫东;
李卫国;
李晓玲;
李小男;
李学潜;
梁勇飞;
刘北江;
刘春秀;
刘芳;
刘峰;
刘宏邦;
刘怀民;
刘觉平;
刘倩;
刘荣光;
刘振安;
吕峰;
鲁公儒;
吕军光;
罗成林;
马凤才;
马海龙;
马秋海;
M.Q.A.Malik;
毛泽普;
莫晓虎;
聂晶;
S.L.Olsen;
平荣刚;
邱进发;
荣刚;
阮向东;
单连友;
尚雷;
沈成平;
沈肖雁;
盛华义;
孙海生;
孙胜森;
孙永昭;
孙志嘉;
唐晓;
田俊平;
G.S.Varner;
万霞;
王岚;
王亮亮;
王灵淑;
王平;
王佩良;
王贻芳;
王铮;
王至勇;
魏诚林;
魏代会;
吴宁;
许国发;
俆新平;
俆晔;
阎沐霖;
杨洪勋;
杨明;
杨永栩;
叶铭汉;
叶云秀;
喻纯旭;
苑长征;
袁野;
曾云;
张丙新;
张炳云;
张长春;
张达华;
张华桥;
章红宇;
张家文;
张建勇;
张学尧;
张一云;
张子平;
赵京伟;
赵明刚;
赵平平;
赵政国;
郑波;
郑海青;
郑建平;
郑志鹏;
钟彬;
周莉;
朱科军;
朱启明;
朱兴旺;
朱永生;
朱自安;
邹冰松;
【Author】
M.Ablikim1 J.Z.Bai1 Y.Bai1 Y.Ban11 X.Cai1 H.F.Chen17 H.S.Chen1 J.C.Chen1 J.Chen1 Y.B.Chen1 Y.P.Chu1 Y.S.Dai19 Z.Y.Deng1 S.X.Du1a J.Fang1 C.D.Fu1 Y.Gao15 Y.T.Gu4 Z.J.Guo16b F.A.Harris16 K.L.He1 M.He13 Y.K.Heng1 H.M.Hu1 T.Hussain1c T.Hu1 G.S.Huang17 X.T.Huang13 Y.P.Huang1 T.Hussain1c X.B.Ji1 X.S.Jiang1 J.B.Jiao13 D.P.Jin1 S.Jin1 G.Li1 H.B.Li1 J.Li1 L.Li1 R.Y.Li1 W.D.Li1 W.G.Li1 X.L.Li13 X.N.Li1 X.Q.Li10 Y.F.Liang14 B.J.Liu1 C.X.Liu1 Fang Liu1 Feng Liu6 H.B.Liu4 H.M.Liu1 J.P.Liu18 Q.Liu16d R.G.Liu1 Z.A.Liu1 F.Lu1 G.R.Lu5 J.G.Lu1 X.L.Luo9 F.C.Ma8 H.L.Ma1 Q.M.Ma1 M.Q.A.Malik1c Z.P.Mao1 X.H.Mo1 J.Nie1 S.L.Olsen12 R.G.Ping1 J.F.Qiu1 G.Rong1 X.D.Ruan4 L.Y.Shan1 L.Shang1 C.P.Shen16e X.Y.Shen1 H.Y.Sheng1 S.S.Sun1 S.S.Sun1 Y.Z.Sun1 Z.J.Sun1 X.Tang1 J.P.Tian15 G.S.Varner16 X.Wan1 L.Wang1 L.L.Wang1 L.S.Wang1 P.Wang1 P.L.Wang1 Y.F.Wang1 Z.Wang1 Z.Y.Wang1 C.L.Wei1 D.H.Wei3 N.Wu1 G.F.Xu1 X.P.Xu6f Y.Xu10 M.L.Yan17 H.X.Yang1 M.Yang1 Y.X.Yang3 M.H.Ye2 Y.X.Ye17 C.X.Yu10 C.Z.Yuan1 Y.Yuan1 Y.Zeng7 B.X.Zhang1 B.Y.Zhang1 C.C.Zhang1 D.H.Zhang1 H.Q.Zhang1 H.Y.Zhang1 J.W.Zhang1 J.Y.Zhang1 X.Y.Zhang13 Y.Y.Zhang14 Z.P.Zhang17 J.W.Zhao1 M.G.Zhao10 P.P.Zhao1 Z.G.Zhao17 B.Zheng1 H.Q.Zheng11 J.P.Zheng1 Z.P.Zheng1 B.Zhong1 L.Zhou1 K.J.Zhu1 Q.M.Zhu1 X.W.Zhu1 Y.S.Zhu1 Z.A.Zhu1 B.S.Zou1 1 Institute of High Energy Physics,Beijing 100049,China 2 China Center of Advanced Science and Technology,Beijing 100190,China 3 Guangxi Normal University,Guilin 541004,China 4 Guangxi University,Nanning 530004,China 5 Henan Normal University,Xinxiang 453007,China6 Huazhong Normal University,Wuhan 430079,China 7 Hunan University,Changsha 410082,China 8 Liaoning University,Shenyang 110036,China 9 Nanjing Normal University,Nanjing 210046,China 10 Nankai University,Tianjin 300071,China 11 Peking University,Beijing 100871,China 12 Seoul National University,Seoul,151-747 Korea 13 Shandong University,Jinan 250100,China 14 Sichuan University,Chengdu 610064,China 15 Tsinghua University,Beijing 100084,China 16 University of Hawaii,Honolulu,Hawaii 96822,USA 17 University of Science and Technology of China,Hefei 230026,China 18 Wuhan University,Wuhan 430072,China 19 Zhejiang University,Hangzhou 310027,China a now at Zhengzhou University,Zhengzhou 450001,China b now at Johns Hopkins University,Baltimore,MD 21218,USA c now at Centre for High Energy Physics,University of the Punjab,Lahore-54590,Pakistan d now at Graduate University of Chinese Academy of Sciences,Beijing 100049,China e now at Nagoya University,Nagoya,Japan f now at Soochow University,Suzhou 215006,China
【机构】
Institute of High Energy Physics;
Peking University;
University of Science and Technology of China;
Zhejiang University;
Zhengzhou University;
Tsinghua University;
Guangxi University;
University of Hawaii,Honolulu;
Johns Hopkins University;
Shandong University;
Centre for High Energy Physics,University of the Punjab;
Nankai University;
Sichuan University;
Huazhong Normal University;
Wuhan University;
Graduate University of Chinese Academy of Sciences;
Henan Normal University;
Nanjing Normal University;
Liaoning University;
Seoul National University;
Nagoya University;
Guangxi Normal University;
Soochow University;
China Center of Advanced Science and Technology;
Hunan University;
【摘要】 The decay ψ(2S) →Ω-■+ is analyzed using 14 × 106 ψ(2S) events recorded by the Beijing Spectrometer Ⅱ(BESⅡ) at the Beijing Electron Positron Collider(BEPC).Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit,we determine the upper limit for the branching fraction of ψ(2S)→Ω-■+ to be 1.5×10-4 at a 90% confidence level.By including events with one missing charged track,we are able to report the first evidence of an Ω-■+ signal with a statistical significance of 3.1σ.The branching fraction of ψ(2S)→Ω-■+ is determined to be(4.80±1.56(stat)±1.30(sys))×10-5.更多还原
【Abstract】 The decay ψ(2S)→Ω-■+ is analyzed using 14×106 ψ(2S) events recorded by the Beijing Spectrometer Ⅱ(BESⅡ) at the Beijing Electron Positron Collider(BEPC).Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit,we determine the upper limit for the branching fraction of ψ(2S)→Ω-■+ to be 1.5×10-4 at a 90% confidence level.By including events with one missing charged track,we are able to report the first evidence of an Ω-■+ signal with a statistical significance of 3.1σ.The branching fraction of ψ(2S)→Ω-■+ is determined to be(4.80±1.56(stat)±1.30(sys))×10-5.更多还原
【基金】 Supported by National Natural Science Foundation of China(10491300,10225524,10225525,10425523,10625524,10521003, 10821063,10825524);Chinese Academy of Sciences(KJ 95T-03);100 Talents Program of CAS(U-11,U-24,U-25);Knowledge Innovation Project of CAS(U-602,U-34(IHEP));National Natural Science Foundation of China(10775077,10225522)(Tsinghua University);Department of Energy(DE-FG02-04ER41291)(U.Hawaii)